One thing I would add to an entertainment forum which I havent seen done yet is to have a area where people can post if seeing a celebrity. Then can also add if they have been to a place where a movie was shot or was being shot. People can say hey I saw Hillary Clinton picking her nose while visiting Times Square something like that. Also to get things really moving I would put contests for movie tickets, dinners, and gift certificates. Another thing that would be fun is after a certain amount of posts you can be knows as a superstar and before that you can make the ranks of a B movie star, water boy, has been kind of titles before you make it to superstar.
Lexio
I hope this helps